What is the concentration of arsenic in ppb

Assignment Help Chemistry
Reference no: EM13849181

A 45-g serving of a white rice contains 9.0 µg of inorganic arsenic.  What is the concentration of arsenic in ppb?   _____________

How many digits should this number contain?  _____________     If you didn't already do this, write the answer in scientific notation to show the correct number of digits.  ______________

Reference no: EM13849181

Questions Cloud

What would be the dollar value of depreciation : On February 22, 2010 (the real Washington's Birthday!) you company bought office furniture for thirty two thousand dollars. What would be the dollar value of depreciation your company could take in the following years assuming they use MACRS:
What kind of obstacles are you facing at work : Do you have any personality traits that might hold you back? For example, do you have a fear of public speaking, yet work where you are expected to conduct regular meetings?
Calculate deltagrxn and ecell for a redox reaction : 1. Calculate deltaGrxn and Ecell for a redox reaction with n=4 that has an equilibrium constant of K=4.7x10^-2. Express each answer using two significant figures.2. A patient is given .055 mg of technetium-99 m, a radioactive  isotope with a half-lif..
Write a marketing plan for cooking oil manufacturing : Write a Marketing Plan for Cooking Oil and Margarine Manufacturing in Australia. Client Needs and Expectations. A paragraph here of what you think your client's needs and expectations were for this report.
What is the concentration of arsenic in ppb : A 45-g serving of a white rice contains 9.0 µg of inorganic arsenic.  What is the concentration of arsenic in ppb?   _____________ How many digits should this number contain?  _____________     If you didn't already do this, write the answer in scie..
Assuming the tank is sitting in water at 298 k : Consider a scuba tank (12.0 L volume) initially at 1.00 atm that is subsequently filled to 200atm with oxygen (average M ~ 32.00 g/mol, Cp! = 29.355 j.mol^-1k^-1) behaving as an ideal gas. Assuming the tank is sitting in water at 298 K at an external..
Why is method misleading to the stakeholders : Shifting Future Expenses to the Current Period as a Special Charge A company might choose to accelerate discretionary expenses, such as repairs and maintenance, into the current period if the current year’s revenue is relatively high in relation to e..
The isothermal compressibility of diamond : The isothermal compressibility of diamond is 0.187 x 10-6 atm-1. (a) Express this value in Pa-1. (b) A cube of diamond 10 cm on each side at 25 °C is to be inserted in the keel of an underwater exploration TV camera, and its designers needed to know ..
Evaluate and explain the value of a job description : For your current job or a previous job, evaluate and explain the value of a job description from the perspectives listed below. An employee performing a selected job

Reviews

Write a Review

 

Chemistry Questions & Answers

  Titration of 50 ml sample of acetic acid is performed by

titration of 50 ml sample of acetic acid is performed by dropwise addition of 0.7 m naoh. a total of 11.9 ml of the

  Evaluate the ph after the addition of naoh

Calculate the pH of 0.510 L of a 0.220 M NH_4Cl and 0.220 M NH_3 buffer before and after the addition of the following substances.

  Compute the molarity of the saturated naoh solution

sodium hydroxide is extremely soluble in water. At a certain temperature, a saturated solution contains 551g of NaOH (s) per liter of solution. Calculate the molarity of this saturated NaOH (aq) solution.

  Explain the metal and the threshold wavelength of the metal

Electrons with a maximum KE of 3.00 eV are ejected from a metal surface by ultraviolet radiation of wavelengh 150 nm. Determine the work function of the metal and the threshold wavelength of the metal

  Determine what is the mass in gms

Phosphorus is combined with chlorine to give PClz a gaseous compound .calculate the value of z If you start with 2.097g of P and isolate 9.298g of PCLz .

  Calculate the equilibrium constant for the given reaction

"Given the following standard reduction potentials, E°redAl3+/Al = -1.66 V. E°redCr3+/Cr = -0.74 V.

  What is the pressure of 3.60mol of gas d measured

Question- To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes. What is the pressure of 3.60mol of gas D measured at 251 C in a 1.75-L container assuming rea..

  Explain completely titrate of weak monoprotic acid

41.89 mL of NaOH were required to completely titrate 25.00 mL of a weak monoprotic acid. After 11.90 mL of sodium hydroxide had been added to the solution, the pH of the solution was 6.81. Calculate K_a_ and pK_a_ for this weak acid.

  You have a solution of sodium nitrate containing 140 g at

you have a solution of sodium nitrate containing 140 g at 65 degrees celcius. how many additional grams of solute must

  Explain what are the organic and aqueous layers cyclohexene

Explain what are the organic and aqueous layers cyclohexene from cyclohexanol reactions utilizing sulfuric and phosphoric acids

  Define mole of hydrogen phosphate

What volume, in mL, of a hydrogen phosphate solution that is 85.5% hydrogen phosphate, by mass, contains 0.100 mole of hydrogen phosphate. The density of the solution is 1.70 g/mL.

  Write also ionic equation to show what happens

Write and ionic equation to show what happens when we add small quantities of H+ ions to a buffer solution that contains equimolar amounts

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd